int-2 Amplification in breast cancer: Association with decreased survival and relationship to amplification of c-erbb-2 and c-myc

✍ Scribed by J. A. Henry; C. Hennessy; D. L. Leveit; T. W. J. Len Nard; B. R. Westley; F. E. B. May

• Publisher: John Wiley and Sons
• Year: 1993
• Tongue: French
• Weight: 778 KB
• Volume: 53
• Category: Article
• ISSN: 0020-7136
• DOI: 10.1002/ijc.2910530512

✦ Synopsis

Amplification of the int-2 oncogene was measured in a series of breast tumours and related to amplification of the c-myc and c-erbB-2 oncogenes, histopathological features and relapse-free and overall survival. int-2 was amplified in I I%, c-myc in 20% and c-erbB-2 in 27% of the tumours assessed. int-2 amplification was associated with large tumour size (p < 0.05) and reduced relapse-free (p < 0.05) and overall (p < 0.0005) survival. c-myc amplification was associated with poor tumour differentiation (p < 0.05) but had no association with prognosis. c-erbB-2 amplification was associated with low levels of expression of oestrogen receptor mRNA (p < 0.05), poor tumour differentiation (p < 0.05) and shortened relapse-free (p < 0.OOOl) and overall survival (p c 0.0001). This is the first report of an association between amplification of the int-2 oncogene in breast tumours and a significantly increased risk of death from breast cancer, and suggests that int-2 may be useful for identifying breast-cancer patients having a poor prognosis.